Present‐day periglacial activity in the Natal Drakensberg, Southern Africa: A Short Review
作者:
J. Boelhouwers,
期刊:
Permafrost and Periglacial Processes
(WILEY Available online 1991)
卷期:
Volume 2,
issue 1
页码: 5-12
ISSN:1045-6740
年代: 1991
DOI:10.1002/ppp.3430020104
出版商: John Wiley&Sons, Ltd
关键词: Periglacial;Soil frost phenomena;Drakensberg;Southern Africa
数据来源: WILEY
摘要:
AbstractActive periglacial features are described for the Natal Drakensberg, a mountain region in southern Africa reaching up to 3482 m a.s.l. Surficial diurnal freezing is evident by features associated with needle ice activity, while thufa and micropatterned ground indicate more severe frost penetration. Solifluction phenomena are noted but have been insufficiently described as yet. Local environmental factors, such as aspect, moisture, topography, soil depth and texture, appear important in the regional distribution of periglacial features.An altitudinal zonation of periglacial activity is tentatively linked to climatic thresholds but is inhibited by the influence of other environmental factors and a lack of climatic data. A marginal periglacial environment appears to prevail in the Drakensberg.
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